Door-knob



(No Model.)

J. A GUSTAVSON.

DOOR KNGB.

N0. 433,464. Patented Aug. 5, 1890 UNITED STATES PATENT FFICE.

JOHN AUGUST GUSTAVSON, OF CHICAGO, ILLINQIS.

DOOR-KNO SPEGIFICATION forming part of Letters Patent 1\To. 433,464,dated August 5, 1890.

Application fi1ed December 12, 1887. Serial No. 257,623. (No model.)

T aZZ whom it may concern:

Be it known that I, J OHN AUGUS'I GUSTAV- SON, a resident of Ohieago,Cook county, end

State of I11inois, and a citizen of Sweden,

represents a longitudinai sectional view of two slightly-differng for1nsof my improved knob as atteched to er door G. Fig. 2 shows a transverseview of the body of the knob With the head removed, and Fig. 3represents one method of seeuring the head to ihe body of the knob.

lhe rose or p1ate C, which 1nry be fastened to the door G either by thesorews e or by c1aws 01 barbs cast as a part of sad plate, is providedwith a tubu1ar stem 0 and ,Withii whioh the reetanguler spindle Drevoives free1y. The ends of the spindle D are fitted into oorrespondingreetangular holes in the body A and A of the knobs 1 and 2 at d,by whiehmeansa rotary motion is imparted to in The parts are retained in p1aoeby the adjustment of a nut E upon the threaded ends d of the spind1e 1),and to prevent this nut from werking 1oose a washer F is p1ao-ed beneathit. Thespindle D is threaded for a sufficient distanoe at e ach end topermit of the use of the knob u 1on doors of varying thickness.

The body A of the knob 1 is fitted niee1y npon the stem 0 and seatedwithin a suitable recess in the rose C, so that it has a long latera1bearing upon the stem 0 andafirrn transverse hearing upon the rose 0.The body A of the knob 2 has its transverse hearing, at the outer endand its lateral hearing npon the sides of the stem 0.

The head B of the knobs 1 and 2 may be of any desirable form, Gare beingtaken to provide for amp1e space for the end of the stem D in case ofthe use of the knobupon a thin door, and it may be attaohed to the bodyA and A in a variety of methods. 'lhe most desirable method ofattaohment is illustrated in Fig. 3, in whioh the head B serves thepurpose mereiy of {L faee 01 front, the body A constituting the knobproper, and being the portion grasped by the hand in practical use. Itwill be seen chat very litt1e strain Wii1 come upon the head B in thismethod of construction, and henoe it will be retained seourely in itsp1aoe if the joint Z2 is made a close fit, end two or more small flatsprings, as a are attached to head B, each being provided With therounded 1ug a at its 1oose end '00 engage in a, suitable groove in theinner W2L11 of the body Awhen the head is adj usted. The head can bereadily rernoved by inserting a chise1 01 other similar tool at thejoint b Should the 1162LC1 be attached inrnanner smilar to that shown inFig. 1, by means of the screws b, it will be found advisable to make thebody A and A WD1 small longitudinal rdges and the headB withcorresponding grooves, so as to prevent the head f1om turning and torelieve the screws b from the strain chat wou1d otherwise fail uponthe1n. Fig. 2 shows these ridges a' upon the inner wa11 of the body A,the head to be adjusted within the body, and not upon .t, es in Fig. 1.

It will be seen that in attaching my improved knob to er door the usua1unpieasant lateral play is who1ly prevented by the proper adj ustment ofthe nuts E, whiie the stem 0 and a entirely prevents a11 transverse1notion, and the knob is limited to the simp1e rotary 1n0- tion desired.

I claim- 1. A spindle D, having ts ends threaded and supplied with thenuts E, in oombination with the knob 1, consisting of the body A, havinga lateral hearing upon and external to a fixed tubular stem, the head B,and the rose O, having a tubu1ar stem, substantialiy as and for thepurposes desorbed.

2. In a doorknob, the bodyA, withthe head B adjusted thereto by thejoint 19', and the spring a and 1ug (1, adapted to secure said head m1dbody together, substantially as shown and described.

JOHN AUGUST GUSTAVSON.

itnesses:

F. M. IIUNTER, \BENOER WARD.

